Rogers speed?
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Rogers speed?

  1. #1
    Junior Member LD77482's Avatar
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    Default Rogers speed?

    I have a Rogers Bonneville TR 19. It has a Chevy 461 with 550 to 600 horsepower depending on which pump chart you are looking at. It turns 5600 RPM with a Berkeley A impeller. The fastest I can get the boat to is 70 mph. It will do that with just me in it or 4 people and a cooler of beer. It does have a homemade loader in it. It looks like a rockgrate that someone tried to make into a loader with angle iron. It hangs down about 3/4" below the keel. Could this be the problem? What loader do yall recommend with this boat? Thanks.

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    Senior Member larryfknrocks's Avatar
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    Not quite sure on the loader but that impeller is fairly big for your application. You should try a B impeller

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    Senior Member bc18's Avatar
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    Quote Originally Posted by LD77482 View Post
    I have a Rogers Bonneville TR 19. It has a Chevy 461 with 550 to 600 horsepower depending on which pump chart you are looking at. It turns 5600 RPM with a Berkeley A impeller. The fastest I can get the boat to is 70 mph. It will do that with just me in it or 4 people and a cooler of beer. It does have a homemade loader in it. It looks like a rockgrate that someone tried to make into a loader with angle iron. It hangs down about 3/4" below the keel. Could this be the problem? What loader do yall recommend with this boat? Thanks.
    Sounds like a v blocker loader. Hanging below keel isn't necessarily a problem. Best advice would be to post some pictures of your set up and you'll get feed back.

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    Senior Member Heatseeker's Avatar
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    I have the same hull as you. I would say that 70 with 550-600 HP isn't too bad. With a little tweaking(a decent loader to start with), you should be able to squeeze a little more out of it.

    Personally, I would keep with the A impeller. Sure, running a B will give you a few MPHs, but you are going to pay for it in wear and tear on your engine and added fuel consumption. Just my opinion.

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    Senior Member cyclone's Avatar
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    Quote Originally Posted by LD77482 View Post
    I have a Rogers Bonneville TR 19. It has a Chevy 461 with 550 to 600 horsepower depending on which pump chart you are looking at. It turns 5600 RPM with a Berkeley A impeller. The fastest I can get the boat to is 70 mph. It will do that with just me in it or 4 people and a cooler of beer. It does have a homemade loader in it. It looks like a rockgrate that someone tried to make into a loader with angle iron. It hangs down about 3/4" below the keel. Could this be the problem? What loader do yall recommend with this boat? Thanks.
    your rpm(5,600) doesn correlate with your speed given the impeller size you have. What condition is the pump in? can you post a pic of your loader? is there a ride plate and shoe on the boat?

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    I have a 1974 Rodgers Bonneville and it runs 72 MPH on GPS at the local lakes in Phoenix, and 78 MPH at the Parker drag races. The boat has a 461 BBC with a single 750 CFM carb that dynoed right at 495HP running through the original log exhaust. Turning a "B" impeller the engine spins 5700-5900 RPM depending on weather and location. The pump is in the stock location, has the original ride plate installed by Roger, no droop and a new style Place Diverter.

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    Senior Member Heatseeker's Avatar
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    Quote Originally Posted by cyclone View Post
    your rpm(5,600) doesn correlate with your speed given the impeller size you have. ...
    I should've read the post more closely.

    How've you been Mike?

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    Junior Member LD77482's Avatar
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    I will take pics today. The boat has a shoe, ride plate and droop. Its a berkeley JG pump. We pulled the pump apart a couple months ago and everything looked good. I will be installing a stainless impeller, inducer, stuffer, and different loader. I plan on spraying a 300 shot on this motor also.

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    Senior Member bp298's Avatar
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    Quote Originally Posted by bc18 View Post
    Sounds like a v blocker loader. Hanging below keel isn't necessarily a problem. Best advice would be to post some pictures of your set up and you'll get feed back.
    not a v-blocker. sounds very much like a speed grate. very popular about 40 years ago. I still have 2 or 3 laying around someplace...

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    Senior Member fleetimus's Avatar
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    Sounds like this loader
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Is this real or the "Twilight Zone"?

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    Senior Member Futs's Avatar
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    Quote Originally Posted by fleetimus View Post
    Sounds like this loader

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    Senior Member bc18's Avatar
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    Quote Originally Posted by bp298 View Post
    not a v-blocker. sounds very much like a speed grate. very popular about 40 years ago. I still have 2 or 3 laying around someplace...
    makes sense now that he stated the angle iron hung below the boat.

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    Senior Member bp298's Avatar
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    Quote Originally Posted by fleetimus View Post
    Sounds like this loader
    some call these ramp scoops. they have been called speed grates. same thing...

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    I think your about what it should be for a stock bottom and a ski boat set up. Sure there are a lot of Rogers running bigger numbers but not without a bunch of work and a hell of a lot of dollars. You will hear a lot of numbers but really your doing pretty good and I have worked on a couple Rogers in my life.

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